Lesson Summary. A force, which is a push or a pull, can come in different sizes, directions, and types. They are the result of interactions between two objects. And while each object exerts a force on the other, there may be other forces involved in the interaction as well.ven objects falling downward through the air experience friction acting upward, this time from the air. This special type of frictional force is called air resistance. It's the friction that acts on an object as it moves through the air.
tarmac. n. 1. (Civil Engineering) a paving material that consists of crushed stone rolled and bound with a mixture of tar and bitumen, esp as formerly used for a road, airport runway, etc. Full name: tarmacadam See also macadam. 2. (Aeronautics) the tarmac a runway at an airport: on the tarmac at Nairobi airport.armac. n. 1. (Civil Engineering) a paving material that consists of crushed stone rolled and bound with a mixture of tar and bitumen, esp as formerly used for a road, airport runway, etc. Full name: tarmacadam See also macadam. 2. (Aeronautics) the tarmac a runway at an airport: on the tarmac at Nairobi airport.
Coco coir is made from the residue of the extraction of long fibers from the husks of coconuts. Peat moss is a dead layer under living sphagnum moss growing on top of bogs in North America, Ireland, Scotland and northern Europe. Peat moss is a traditional soilless growing medium.